Block diameter: 90mm
Block thickness: 16mm
Available hardness values: 60 / 80 / 100 / 150
Calibration Details: The hardness reference block will be examined in the UPI calibration laboratory and will be found to comply with the requirements of ISO 6506-3 and ASTM E10. The hardness reference block value will be calibrated on a standardizing machine complying with the requirements of ISO 6506-3 and ASTM E10 having hardness scales traceable to the National Scales as defined by Physikalisch-Technische Bundesanstalt National Metrology Institute, Braunschweig, Germany.
Calibration temp.: (23 ± 2) °C
Relative Humidity: < 70 %rh
Validity: This hardness reference block will only be valid for the scale for which it was calibrated. It is recommended that the duration of the calibration validity should be limited to 5 years. Attention is drawn to the fact that, for Al-alloys and Cu-alloy, the calibration validity should be reduced to 2 to 3 years.
Uncertainty: The reported expanded uncertainty will be based on a standard uncertainty multiplied by a coverage factor k=2, providing a level of confidence of approximately 95%. The uncertainty evaluation will be carried out in accordance with International requirements.
Traceability: All measurements involved are traceable to international applicable standards.